Find the best online casinos for online slot machines at Online Casino Slot Machine! See our top online casinos list right below! USA players welcome at some of our top casinos.

Great Casino Offers

Spin Palace Winner Casino dot com EU Casino 3D Slot Machines Royal Vegas Mansion Casino Big jackpot in Beach Life slots at Casino King Click here to play at Casino Tropez! Casino Swiss slot machines Betfair Casino Play Hulk at William Hill

Slots in Online Casinos

A wide variety of slot machines with different interesting themes can be played online. Because playing slot machines doesn't require any skills to be acquired or any rules to be learned, it is immensely popular with beginners.

Iron Man 2

Slot machines can be played online and one has the option to play it with real money or just play money. There are some online casinos that are generous enough to give play money gamblers who play well with a prize called free real money spin.

Here they get to play and win real money without placing any real money bet. For someone who is really lucky, a $1 bet could win that someone an immense jackpot that could change his or her life.

Slot machines can have progressive jackpots. Meaning, as long as the jackpot isn't won, it will continuously increase as bets are placed in it. This game is based purely on luck and you may opt to stick with just one machine or try the others out. However, most machines these days are linked electronically so it doesn't really matter on what machine you play.

The probability of hitting the jackpot is the same for all machines. Slot machines these days are able to display the amount of bets you've wagered and the subsequent winnings for each of these betting instances.

The Lord of the Rings: The Fellowship of the Ring slot machine

With it, you'll be able to see if you are on a losing streak. If you are, then the house edge is really taking a toll on you and you must consider taking a break. This will help ensure you don't shoot through your entire bankroll in the blink of an eye.

Statistics show that $5 machines provide the highest payouts compared to the other lower bet machines, so that is something to bear in mind when looking for a game to play.

Progressive slots offer players with the biggest amount of jackpots. If you are losing on the machine, it is best not to dwell on playing it for too long. Since slot machines have no exact rules, the chances of winning are just a factor of probability, house edge and strategy.

Written by Alex Corcoran, a fan of online casino games and slots.


U.S. Players

USA flag

Looking to play online casino slot machines for money? Scroll down to our American-friendly casinos section.

Online Slots Newsletter

Sign up to our mailing list and we will send you our monthly newsletter packed with exclusive offers.

WIN A TABLET PC and receive the latest exclusive gambling offers by email! Sign up to our mailing list for free:

Featured Online Casino

Spin Palace Casino

Spin Palace lobby

Spin Palace is one of the most well-known online casinos around the world. Using Microgaming online gaming software, Spin Palace has the best games and biggest jackpots in a gaming environment that constantly exceeds all expectations.

Spin Palace boasts an average payout ratio of 97%, along with excellent customer service in various languages and constant promotions, campaigns and special loyalty bonuses for regular players.

Payments are done in a secure environment and a wide range of deposit options are available, including MasterCard, Visa, Firepay, Neteller, Switch, Delta and many others.

Read full review   —   Play now >>

Featured USA Casino

Due to online gambling legislation sneakily passed by Congress in 2006, online casino operators face difficulties in operating in the US market. The result of this is a reduction of choice for American players.

Among the reputable US-friendly casinos, we consider the RTG-powered casinos to be the clear winner, as the other softwares are simply not as good.

Grand Parker Casino

Grand Parker Casino is a great place to play for USA based players. It uses state of the art software from Real Time Gaming and offers one of the best and most secure payment processing systems around so that you can be sure your deposits and withdrawals are dealt with safety and confidence.

Grand Parker

At Grand Parker Casino you can enjoy over 100 of the best online casino games in the business. Check out the Casino Games by clicking the Instant Play button on the casino homepage or for even better graphics you can download the Real Casino lobby using the download button.

This RTG online casino are offering all new players an amazing welcome bonus of up to $8,000 free over their first three deposits. First, you can take advantage of a 250% bonus for your first two deposits. Then, follow that up with an even higher 300% on the third deposit.

This means that you can get up to $8,000 in bonus money to use on Grand Parker's thrilling slots machines!

Play at Grand Parker Casino >>

Featured Online Slot

The Dark Knight

The Dark Knight slot machine

The Dark Knight arrives to Microgaming online casinos! Fans of the comic series and slot machines will definitely not be disappointed with this one, its only major problem being that it cannot be played for free.

This will become known as the Batman Slots Game, as it is poised to become one of Microgaming's most popular casino slot games.

The graphics and special effects are superb, with cinematics interspersed along the game as you unlock features like free spins and a bonus round. When you score a "Big Win" you will be shown action-packed scenes from the movie.

The Dark Knight slot machine

Like with The Lord of the Rings slot, Batman Slots uses a special effect named Cinematic Spins. As you spin the reels, the reels will become transparent and action sequences from the film will play in the background. Microgaming calls this a whole new technology, dubbing it "Cinematic Spins".

On the main game screen itself there is plenty of animated stuff going on. For example, at any time in the game, Batman will appear and transform one of the reels into a stacked Wild. Joker will also show up to drop a bomb on the screen, revealing a cash price in the process.

For some reason Microgaming decided to make this game very dark, too dark. The game can be appreciated more by increasing the brightness of your monitor.

Be aware that this is a progressive slot machine, which unfortunately means that you can only play it with real money, not with a fun account.

The Dark Knight slot machine

The progressive jackpot is played out in the roulette wheel round, where you will win one of four progressive jackpots, the biggest of which would make you a millionaire!

Play at Royal Vegas >> Sign up now and enjoy up to $/€1200 free in bonuses on your first 6 deposits

Previously featured slot machines